1 /* POSIX.1 sigaction call for Linux/SPARC.
2 Copyright (C) 1997-2000,2002,2003,2005 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx), 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>.
19
20 Ported to uClibc from glibc: 090520:
21 Jan Buchholz, KIP, Uni Heidelberg <jan.buchholz@kip.uni-heidelberg.de>
22 Austin Foxley, Ceton Corporation <austinf@cetoncorp.com>
23 */
24
25 #include <errno.h>
26 #include <signal.h>
27 #include <string.h>
28 #include <sys/syscall.h>
29 #include <bits/kernel_sigaction.h>
30
31
32 _syscall5(int, rt_sigaction, int, a, int, b, int, c, int, d, int, e)
33 void __rt_sigreturn_stub(void);
34 void __sigreturn_stub(void);
35
__libc_sigaction(int sig,const struct sigaction * act,struct sigaction * oact)36 int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
37 {
38 int ret;
39 struct sigaction kact, koact;
40 unsigned long stub = 0;
41
42 if (act) {
43 kact.sa_handler = act->sa_handler;
44 memcpy (&kact.sa_mask, &act->sa_mask, sizeof (sigset_t));
45 if (((kact.sa_flags = act->sa_flags) & SA_SIGINFO) != 0)
46 stub = (unsigned long) &__rt_sigreturn_stub;
47 else
48 stub = (unsigned long) &__sigreturn_stub;
49 stub -= 8;
50 kact.sa_restorer = NULL;
51 }
52
53 /* XXX The size argument hopefully will have to be changed to the
54 * real size of the user-level sigset_t. */
55 ret = INLINE_SYSCALL (rt_sigaction, 5, sig, act ? &kact : 0,
56 oact ? &koact : 0, stub, _NSIG / 8);
57
58 if (oact && ret >= 0) {
59 oact->sa_handler = koact.sa_handler;
60 memcpy (&oact->sa_mask, &koact.sa_mask, sizeof (sigset_t));
61 oact->sa_flags = koact.sa_flags;
62 oact->sa_restorer = koact.sa_restorer;
63 }
64 return ret;
65 }
66
67
68 #ifndef LIBC_SIGACTION
69 # ifndef __UCLIBC_HAS_THREADS__
70 strong_alias(__libc_sigaction,sigaction)
71 libc_hidden_def(sigaction)
72 # else
73 weak_alias(__libc_sigaction,sigaction)
74 libc_hidden_weak(sigaction)
75 # endif
76 #endif
77
78